Mandrel-press



F. BURTT.

MANDREL PRESS. APPLICATION FILED APR. 10. 1920.

1,356,905. Patented Oct. 26 2o.

3 SHEETS-SHE I I II- avwenl'oz FranK Bur-12f wiweoux v -l.

F. BURTT.

.MANDREL PRESS.

APPLICATION FILED APR. 10, 1920.

3 nocutoz 'Frn n K Bu 14:1:

3 SHEETS-SHEET 2.

Patented Oct. 26, 1920..

F. BURTT.

MANDREL PRESS.

APPLICATION FILED APR. 10. 1920.

Patented Oct. 26, 1920.

3 SHEETSSHEET 3- awuentoz Fran IX .Burtt (1 than, 1,

UNITED STATES PATENT OFFICE.

FRANK BUETT, 0F KALAMAZOO, MICHIGAN, ASSIGNOR TO EVANSVILLE ARBOR PRESSCOMPANY, OF EVANSVILLE, INDIANA.

MANDREL-PRESS.

To all whom it may concern:

Be it known that I, FRANK BURTT, a citizen of the United States,residing at Kalamazoo, county of Kalamazoo, State of lliichigan, haveinvented certain new and useful Improvements in Mandrel-Presses, ofwhich the following is a specification.

This invention relates to improvements in mandrel presses. I

The main objects of this invention are:

First, to provide in a mandrel press an improved driving mechanism.

rlecond, to provide in a mandrel press an improved driving mechanismadapted for driving the ram with great power for heavy work and withless power and greater speed for light work and for rapid adjustment tothe work.

Third, to provide in improved ram. g

Further objects, and objects relating to structural details, willdefinitely appear from the detailed'description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. The invention is clearlydefined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearlyillustrated in the accompanying drawing forming .a part of thisspecification, in which:

Figure I is a front perspective view of a mandrel press embodying thefeatures of my invention, the actuating levers being partially brokenaway.

Fig. II is an enlarged detail vertical section on a line correspondingto line 2-2 of Fig. I.

F III is an enlarged detailv view partially in vertical section on aline corresponding to line 3-3 of Figs. II, IV and'V.

Fig. IV is a detail view of the ram driving means partially in sectionon a line corresponding to line 4-4 of Figs. III and V.

Fig. V is a detail view partially in vertical section on a linecorresponding to line 5-5 of Fig. III.

Fig. VI is a detail section on a line corresponding to line 6-6 of Figs.I and III showin details of the actuating means.

a mandrel press an Fig. VI isa detail sectional View corre-Specification of Letters Patent. Patented Oct. 26, 1920.

1920. Serial No. 372,880.

sponding to that of Fig. VI with the actuated lever in its forward oractuated posit1on. r

Fig. VII is an enlarged detail vertical section on a line correspondingto line 7-7 of Fig. I. p

In the drawing similar reference characters refer to similar partsthroughout the several views, and the sectional views are taken lookingin the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the frame comprises a base 1, the uprights 2and 3 and the top plate 4. The uprights are disposed in a triangularposition upon the base with the upright 3 at the rear. Thetop plateconstitutes a support for the ram and its driving means and is providedwith a gear housing 5. The lower portion 60f the gear housing is, in thestructure illustrated, formed integrally with the top plate 4.

The ram comprises a pair of ram members 7 each provided with a rack 8.These ram membersv are disposed back to back through an opening '9 inthe top plate 4. The top 10 of the gear housing 5 is provided with anopening 11 provided with a bearing bushing 12 for the ram. j

At its lower end the ram is provided with foot member 13 adapted toengage the work, the foot member embracing the lower ends of the rammembers, as shown in Fig. VII, and beingsecured to one of them by a lostmotion connection, the foot member being slotted at 14 to receive thescrew 15. Vithin the foot member is a compensating rocker 16 whichreceives the thrust of the ram members, permitting them to equalize oradjust themselves -and compensate for any variation in-the racks, or thedriving connections or lost motion or back lash in the driving gears orlooseness.

The drivingshaft 17 is provided witha driving pinion 18 meshing with agear 19 on the driven shaft 20 disposed at one side of the ram. A seconddriven shaft 21 is disposed on the other side of the ram. These drivenshafts -20 and 21are provided with pinions 22 meshing with the racks 8of the ram. The driven shafts are connected by the gears 23 disposed atone side of the ram, the gear 19, being disposed at the other side ofthe ram, thus providing a com act arrangement as shown in Figs, III, andY.

The driving shaft is provided with a palr of ratchet wheels 24 and 25.Mounted on the driving shaft between these ratchet wheels is a pawlcarrier 26 having a pawl 27 thereon coacting with the inner ratchetwheel 24. Pivoted on this pawl carrier at 28 is an actuating lever 29which is slotted at 30 to engage the pin 31 on the frame so that a verypowerful operating means is provided.

To prevent the ram springing back, I provide a detent .32 which ispivoted at 33 to coact with the ratchet 24. This detent is provided witha rearwardly projecting arm 34 which is engaged by the rear weighted end35 of the lever 29 when the lever is in its rear position therebydisengaging the detent, as shown in Fig. VI, and also disengaging thepawl 27, the detent being disposed so that it lifts the pawl when thedetent is engaged by the lever.

To hold the detent in inoperative position, it is provided with aforwardly projecting arm 36 coacting with the cam -like keeper 37 whichis provided with a finger piece 38 so that the keeper may be readilyadjusted to hold the detent in inoperative position. A hand wheel 39 isprovided for the rapid adjustment of the ram to the work.

To adapt the machine for light and rapid work I provide a second lever40 which is mounted on the driving shaft and provided with a pawl 41coacting with the ratchet wheel 25. This pawl is mounted directly on thelever to coact with the ratchet wheel. This provides means for rapidmanipulations for light work, and further, the rapid actuating lever maybe used to bring the work to a point where the more powerful lever isrequired and this results in great saving of time.

The table or work holder members 42 are pivoted on the frame uprights 2and are provided with work holders 43 eccentricallv curved on theirinner edges so that by adjusting the table members on their pivots, thedistance between the edges of the work holders is varied from theirmaximum to their minimum.

The bases 44 of the work holders rest upon the base 1 when the tablemembers are swung to operative position so that a very rigid table orwork support is provided and one fully adjustable to the work.

With this arrangement of parts I provide a press which is adapted forrapid work as well as work requiring great power. The compensatingfeatures of the ram greatly facilitate manufacture and relieves thegears of undue strains and stresses in operation.

I have illustrated and described my improvements in an embodiment whichI have found very satisfactory. I have not at tempted to illustrate ordescribe certain modifications in structural details which I contemplateas being within the limits of the appended claims as I believe thedisclosure made will enable those skilled in the art to which myinvention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. In a mandrel press, the combination of a frame, a ram, a drivingshaft, driving connections for said shaft to said ram, a pair of ratchetwheels mounted on said driving shaft, a pawl carrier journaled on saiddriving shaft between said ratchet wheels, a pawl on said pawl carriercoacting with the inner ratchet wheel, an actuating leverpivotallymounted on said pawl carrier and having a slot therein, a fulcrum pin onsaid frame engaged with said slot, a second actuating lever journaled onsaid driving shaft on the outer side of the outer ratchet wheel andprovided with a pawl coacting therewith, a detent pivotally mounted onsaid frame to coact with said inner ratchet wheel, said detent beingprovided with forwardly and rearwardly projecting arms, said levermounted on said pawl carrier being adapted to engage said rearwardlyprojecting detent arm when the lever is in its rear position wherebysaid detent is disengaged, and a keeper coacting with the forwardlyprojecting arm to hold said detent in operative position;

2. In a mandrel'press, the combination of a frame, a ram,a drivingshaft, driving conncctlons for said shaft to said ram, a ratchet wheelmounted on said driving shaft, a pawl carrier ournaled on said drivingshaft, a pawl on saidpawl carrier coacting with said ratchet wheel, anactuating lever pivotally mounted on said pawl. carrier and having aslot therein, a fulcrum pin on said frame engaged with said slot, adetent pivotally mounted on said frame to coact with said inner ratchetwheel, said detent being provided with forwardly and rearwardlyproecting arms, said lever being adapted to engage said rearwardlyprojecting detent arm when the lever is in its rear position wherebysaid detentis disengaged, and a keeper coacting with the forwardlyprojecting arm to hold said detent in inoperative position.

3. In a mandrel press, the combination of a frame, a ram, a drivingshaft, driving connections for said shaft to said ram, a ratchet wheelmounted on said driving shaft, an actuating lever, a pawl coacting withsaid ratchet wheel actuated thereby, a detent pivotally mounted on saidframe to coact with said ratchet wheel, said detent being provided withforwardly and rearwardly projectin'garms, said lever being adapted toengage said rearwardly projecting detent arm when the lever is in itsrear position whereby sald detent 1s disengaged and a keeper coactingwith its forwardly projecting arm to hold said detent in inoperativeposition.

4. In a mandrel press, the combination of a frame, a ram comprising apair of ram members disposed back to back and each provided with a rack,a foot embracing the lower ends of said ram members, a compeneatingrocker arranged in said foot member to receive the-thrust of said rammembers, a driving shaft, driving connections for said driving shafttosaid ram comprising a pair of driven pinions meshing with said racksof said rack members, a ratchet wheel mounted on said driving shaft, anactuating lever, a pawl actuated thereby coacting with said ratchetwheel, a detent pivotally mountwheel, said lever being adapted todisengage said detent when in its rear position, and means for lockingsaid detent in inoperative position.

6. In a mandrel press, the combination of a frame, a ram comprising apair of ram members, a thrust compensating means for said ram members, adriving shaft, driving connections for said driving shaft to said rammembers, a ratchet wheel mounted on said driving shaft, an actuatinglever, a pawl actuated thereby coacting with said ratchet wheel, and adetent coacting with said ratchet wheel.

'7. In a mandrel press, the combination of a frame, a ram comprising aplurality of driven ram members, a thrust compensating means for saidram members, a driving shaft, driving connections for said driving shaftto said ram members, a pair of ratchet wheels mounted on said drivingshaft, a pawl carrier journaled on said driving shaft between saidratchet wheels, a pawl on said pawl carrier coacting with the innerratchet wheel, an actuating lever pivotally mounted on said pawl carrierand having a slot therein, a fulcrum pin on said frame engaged with saidslot, and a second actuating lever journaled on said driving shaft onthe outer side of the outer ratchet wheel and provided with a pawlcoacting therewith, all coacting for the purpose specified.

'8. In a mandrel press, the combination of a frame, a ram comprising apin ality of driven ram members, a thrust compensating means for saidram members, a driving shaft, driving connections for said driving shaftto said ram members, a pair of ratchet wheels mounted on said drivingshaft, a pawl carrier journaled on said driving shaft, a pawl on saidpawl carrier coacting with one of said ratchet wheels, an actuatinglever pivotally mounted on said pawl carrier and having a slot therein,a fulcrum pin on said frame engaged. with said slot, and a secondactuating lever journaled on said driving shaft ant. provided with apawl coacting with the other of said ratchet wheels.

9. In a mandrel press, the combination of a frame, a ram comprising apair of ram members disposed back to back and each provided with a rack,a foot member cmbracing the lower ends of said ram mom here, acompensating rocker arranged in, aid foot member to receive the thrustof said ram members, a driving shaft disposed transversely of said ramand provided with a driving pinion, a pair of driven shafts disposed onopposite sides of said ram par allel to said driving shaft, pinions onsaid driven shafts meshing with the racks of said ram members,connecting gears for said driven shafts disposed at one side of saidram, and a gear on one of said driven shafts disposed in. the other sideof said ram and meshing with said pinion on said driving shaft.

10. In a mandrel press, the combination. of a frame, a ram comprising apair of ram members disposed back to back and each provided with a rack,a foot member embracing the lower ends of said ram memhere, acompensating rocker arranged in said foot member to receive the thrustof said ram members, a driving shaft disposed transversely of said ramand provided with a driving pinion, a pair of driven shafts disposed onopposite sides of said ram, pinions on said driven shafts meshing withthe racks of said ram members, connecting gears for said driven shafts,and a gear on one of said driven shafts meshing with said pinion on saiddriving shaft.

11. In a mandrel press, the combination of a frame, a ram comprising apair of ram members disposed back to back and each provided with a rack,a foot member embracing the lower ends of said ram members and having alost motion connection to one of them, a compensating rocker arranged insaid foot member to receive the thrust of said ram members, a drivingshaft disposed transversely of said ram andprovided with a'drivingpinion, a pair of driven shafts disposed on opposite sides of said ram,pinions on said driven shafts meshing with the racks of said rammembers, connecting gears for said driven shafts, and a gear on. one ofsaid driven shafts meshing with said pinion on said driving shaft.

12. in a mandrel press, the combination of a frame, a ram comprising apair of ram members disposed back to back and each provided with a rack,a thrust compensating means for said ram members, a oriving shaftdisposed transversely of said ram and provided with a driving pinion, apair of driven shafts disposed on opposite sides of said ram parallel tosaid driving shaft, pinions on said driven shafts meshing with the racksof said ram members, connecting gears for said driven shafts disposed atone side of said ram, and a gear on one of said driven shafts disposedin the other side of said ram and meshing with said pinion on saiddriving shaft.

13. In a mandrel press, the combination of 'a frame, a ram comprising apair of'ram members disposed back to back and each provided with a rack,a thrust compensating means for said ram members, a driving shaftdisposed transversely of said ram and provided with a driving pinion, apair of driven shafts disposed on opposite sides of said ram andprovided with a driving pinion, a pair of driven shafts disposed onopposite sides of said ram, pinions on said driven shafts meshing withthe racks of said ram members, connecting gears for said driven shafts,and a gear on one of said driven shafts meshing with said pinion on saiddriving shaft.

14L. In a mandrel press, the combination of a frame, a ram comprising apair of ram members disposed back to back and each provided with a rack,a foot member embracing the lower ends of said ram members and having alost motion connection to one of them, a compensating rocker arranged insaid foot member to receive the thrust of said ram. members, and drivingmeans for said ram comprising a pair of ram driving gears meshing withsaid ram member racks.

15. In a mandrel press, the combination of a frame, a ram comprising apair of ram members disposed back to back and each provided with a rack,a foot member 6H1" bracing the lower ends of said ram members, acompensating rocker arranged in said foot member to receive the thrustof saidram n embers, and driving means for said ram comprising a pair ofram driving gears meshing with said ram member racks.

16. In a mandrel press, the combination of a frame, a ram comprising aplurality of driven ram members, a foot member, a compensating rockerarranged on said foot member toreceive the thrust of said ram members,and driving means for said ram members.

17. In a mandrel press, the combination of a frame, a ram comprising aplurality of driven ram members, a thrust compensating ieans for saidram members, and driving means for said ram members.

In witness whereof I have hereunto set my hand and seal in the presenceof a witness.

FRANK BURTT. a s]

